'is not' or '!='
Tim Chase
python.list at tim.thechases.com
Tue Aug 19 13:34:00 EDT 2014
On 2014-08-19 20:29, Marko Rauhamaa wrote:
> The "is" relation can be defined trivially through the id()
> function:
>
> X is Y iff id(X) == id(Y)
>
> What remains is the characterization of the (total) id() function.
> For example, we can stipulate that:
>
> X = Y
> assert(id(X) == id(Y))
Note that a lifetime can be less than a statement:
$ python
Python 2.7.3 (default, Mar 13 2014, 11:03:55)
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> id([1,2,3]) == id([4,5,6])
True
-tkc
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